Touch Panel Interposer Assembly for Transparent Edge Bonding
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Solution Overview
Problem
Current touch panel displays in information handling systems face challenges in efficiently assembling and bonding touch panel interposers with LCD panels and covers, which can affect the durability and transparency of the display, leading to potential mechanical support and interaction detection issues.
Innovation Solution
The use of direct-bonded and air-gap-bonded touch panel interposers, where adhesive layers are applied to bond the touch panel device to both the LCD panel and cover, allowing for transparent interaction detection while providing mechanical support, with curing processes enhancing adhesive properties for robust assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive layers are applied to bond the touch panel interposer to the LCD panel and cover, then mechanical support and structural integrity are improved, but the transparency and interaction detection capability may deteriorate
Solution Approach 1:
The adhesive layers are applied selectively at specific locations (edges and corners) rather than covering the entire surface, allowing the central display area to maintain full transparency while providing mechanical bonding at the boundaries where adhesive visibility is less critical
Solution Approach 2:
The adhesive layer acts as an intermediary bonding material that joins the touch panel interposer to the LCD panel and cover, providing mechanical strength while being positioned and formulated to minimize its impact on optical transparency
2Strength
If the adhesive layers are made opaque to ensure strong bonding, then mechanical support is improved, but the display transparency and user interaction detection are worsened
Solution Approach 1:
The adhesive is concentrated at edges and corners where bonding strength is most needed, allowing the use of stronger (potentially less transparent) adhesive in these localized areas while keeping the central transparent areas free of adhesive interference
Solution Approach 2:
The adhesive application uses a partial coverage approach rather than full coverage, applying adhesive only where structurally necessary to achieve sufficient bonding strength without compromising the overall transparency and touch detection areas
3Productivity
If direct-bonding method is used to assemble the touch panel interposer, then assembly productivity is improved, but manufacturing precision and alignment accuracy may worsen
Solution Approach 1:
Alignment features and positioning structures are prepared in advance on the touch panel interposer, LCD panel, and cover before the bonding process, enabling rapid direct assembly without requiring complex real-time alignment procedures
Solution Approach 2:
The adhesive layer serves as a compensating intermediary that can accommodate minor misalignments between components, allowing for faster assembly speeds while maintaining adequate bonding quality through the adhesive's tolerance to positioning variations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures a durable and transparent touch panel display assembly that effectively detects user interactions and maintains mechanical support, enhancing the overall performance and reliability of the information handling system.
Implementation Method 1
an adhesive layer is applied to a second surface of the touch panel device opposite the first surface, the cover is applied to the adhesive layer, and the LCD panel is applied to the first surface of the touch panel device
Implementation Method 2
with curing processes enhancing adhesive properties for robust assembly
Data Source
AI summary
A method includes providing a touch panel interposer, where providing the touch panel interposer comprises providing a touch panel device, applying a first adhesive layer to a cover side of the touch panel device, and applying a second adhesive layer to a display side of the touch panel device. The method further includes providing a touch panel display, where providing the touch panel display comprises applying a cover to the first adhesive layer, and applying a display panel to the second adhesive layer.